dasdpdsu: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/bin/dasdpdsu - from package: hercules

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/dasdpdsu - from package: hercules

You may install the required package with command apt-get install {package}

Error in other languages:
dasdpdsu: bevel nie gevind nie
dasdpdsu: comandă negăsită
dasdpdsu: comando não encontrado
dasdpdsu: commande introuvable
dasdpdsu: command not found
dasdpdsu: käsku ei ole
dasdpdsu: không tìm thấy lệnh
dasdpdsu: komanda nerasta
dasdpdsu: Kommando nicht gefunden.
dasdpdsu: kommandot finns inte
dasdpdsu: komut yok
dasdpdsu: nie znaleziono polecenia
dasdpdsu: níor aimsíodh an t-ordú
dasdpdsu: no se encontró la orden
dasdpdsu: no s'ha trobat l'ordre
dasdpdsu: opdracht niet gevonden
dasdpdsu: parancs nem található
dasdpdsu: perintah tidak ditemukan
dasdpdsu: príkaz nenájdený
dasdpdsu: příkaz nenalezen
dasdpdsu: команда не найдена
dasdpdsu: командата не е открита
dasdpdsu: 命令找不到
dasdpdsu: コマンドが見つかりません